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40e973dd00
This would have detected the bug in commit 38ad33931 (Aug 09), which we missed until commit f828ca35 (Jul 10); over 11 months later. However, on Fedora 13, it also triggers LOTS of warnings from the libcurl-devel header for two files: esx/esx_vi.c: In function 'esxVI_CURL_Perform': esx/esx_vi.c:232: error: logical '&&' with non-zero constant will always evaluate as true [-Wlogical-op] esx/esx_vi.c:232: error: logical '&&' with non-zero constant will always evaluate as true [-Wlogical-op] esx/esx_vi.c:232: error: logical '&&' with non-zero constant will always evaluate as true [-Wlogical-op] ... xenapi/xenapi_driver.c: In function 'call_func': xenapi/xenapi_driver.c:1872: error: logical '&&' with non-zero constant will always evaluate as true [-Wlogical-op] xenapi/xenapi_driver.c:1872: error: logical '&&' with non-zero constant will always evaluate as true [-Wlogical-op] xenapi/xenapi_driver.c:1872: error: logical '&&' with non-zero constant will always evaluate as true [-Wlogical-op] ... libcurl allows to disable the type-checking code that triggers those warnings, along with the reduction in type-safety of calls to some libcurl functions. I figure this is worth the improved compiler checking throughout the rest of libvirt. * acinclude.m4 (--enable-compile-warnings=error): Add -Wlogical-op. * configure.ac: Add -DCURL_DISABLE_TYPECHECK to LIBCURL_CFLAGS to avoid compilation warning. Suggested by Daniel P. Berrange. Tweaked by Matthias Bolte.
126 lines
4.1 KiB
Plaintext
126 lines
4.1 KiB
Plaintext
dnl
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dnl Taken from gnome-common/macros2/gnome-compiler-flags.m4
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dnl
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dnl We've added:
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dnl -Wextra -Wshadow -Wcast-align -Wwrite-strings -Waggregate-return -Wstrict-prototypes -Winline -Wredundant-decls
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dnl We've removed
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dnl CFLAGS="$realsave_CFLAGS"
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dnl to avoid clobbering user-specified CFLAGS
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dnl
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AC_DEFUN([LIBVIRT_COMPILE_WARNINGS],[
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dnl ******************************
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dnl More compiler warnings
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dnl ******************************
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AC_ARG_ENABLE(compile-warnings,
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[AC_HELP_STRING([--enable-compile-warnings=@<:@no/minimum/yes/maximum/error@:>@],
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[Turn on compiler warnings])],,
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[enable_compile_warnings="m4_default([$1],[maximum])"])
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warnCFLAGS=
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common_flags=
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common_flags="$common_flags -Wp,-D_FORTIFY_SOURCE=2"
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common_flags="$common_flags -fexceptions"
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common_flags="$common_flags -fasynchronous-unwind-tables"
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common_flags="$common_flags -fdiagnostics-show-option"
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case "$enable_compile_warnings" in
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no)
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try_compiler_flags=""
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;;
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minimum)
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try_compiler_flags="-Wall -Wformat -Wformat-security $common_flags"
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;;
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yes)
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try_compiler_flags="-Wall -Wformat -Wformat-security -Wmissing-prototypes $common_flags"
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;;
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maximum|error)
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try_compiler_flags="-Wall -Wformat -Wformat-security"
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try_compiler_flags="$try_compiler_flags -Wmissing-prototypes"
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try_compiler_flags="$try_compiler_flags -Wnested-externs "
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try_compiler_flags="$try_compiler_flags -Wpointer-arith"
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try_compiler_flags="$try_compiler_flags -Wextra -Wshadow"
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try_compiler_flags="$try_compiler_flags -Wcast-align"
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try_compiler_flags="$try_compiler_flags -Wwrite-strings"
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try_compiler_flags="$try_compiler_flags -Waggregate-return"
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try_compiler_flags="$try_compiler_flags -Wstrict-prototypes"
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try_compiler_flags="$try_compiler_flags -Winline"
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try_compiler_flags="$try_compiler_flags -Wredundant-decls"
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try_compiler_flags="$try_compiler_flags -Wno-sign-compare"
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try_compiler_flags="$try_compiler_flags -Wlogical-op"
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try_compiler_flags="$try_compiler_flags $common_flags"
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if test "$enable_compile_warnings" = "error" ; then
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try_compiler_flags="$try_compiler_flags -Werror"
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fi
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;;
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*)
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AC_MSG_ERROR(Unknown argument '$enable_compile_warnings' to --enable-compile-warnings)
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;;
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esac
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COMPILER_FLAGS=
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for option in $try_compiler_flags; do
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gl_COMPILER_FLAGS($option)
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done
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unset option
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unset try_compiler_flags
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AC_ARG_ENABLE(iso-c,
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AC_HELP_STRING([--enable-iso-c],
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[Try to warn if code is not ISO C ]),,
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[enable_iso_c=no])
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AC_MSG_CHECKING(what language compliance flags to pass to the C compiler)
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complCFLAGS=
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if test "x$enable_iso_c" != "xno"; then
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if test "x$GCC" = "xyes"; then
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case " $CFLAGS " in
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*[\ \ ]-ansi[\ \ ]*) ;;
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*) complCFLAGS="$complCFLAGS -ansi" ;;
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esac
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case " $CFLAGS " in
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*[\ \ ]-pedantic[\ \ ]*) ;;
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*) complCFLAGS="$complCFLAGS -pedantic" ;;
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esac
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fi
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fi
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AC_MSG_RESULT($complCFLAGS)
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WARN_CFLAGS="$COMPILER_FLAGS $complCFLAGS"
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WARN_LDFLAGS=$WARN_CFLAGS
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AC_SUBST([WARN_CFLAGS])
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AC_SUBST([WARN_LDFLAGS])
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dnl Needed to keep compile quiet on python 2.4
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COMPILER_FLAGS=
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gl_COMPILER_FLAGS(-Wno-redundant-decls)
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WARN_PYTHON_CFLAGS=$COMPILER_FLAGS
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AC_SUBST(WARN_PYTHON_CFLAGS)
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])
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dnl
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dnl To support the old pkg-config from RHEL4 vintage, we need
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dnl to define the PKG_PROG_PKG_CONFIG macro if its not already
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dnl present
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m4_ifndef([PKG_PROG_PKG_CONFIG],
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[AC_DEFUN([PKG_PROG_PKG_CONFIG],
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[m4_pattern_forbid([^_?PKG_[A-Z_]+$])
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m4_pattern_allow([^PKG_CONFIG(_PATH)?$])
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AC_ARG_VAR([PKG_CONFIG], [path to pkg-config utility])dnl
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if test "x$ac_cv_env_PKG_CONFIG_set" != "xset"; then
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AC_PATH_TOOL([PKG_CONFIG], [pkg-config])
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fi
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if test -n "$PKG_CONFIG"; then
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_pkg_min_version=m4_default([$1], [0.9.0])
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AC_MSG_CHECKING([pkg-config is at least version $_pkg_min_version])
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if $PKG_CONFIG --atleast-pkgconfig-version $_pkg_min_version; then
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AC_MSG_RESULT([yes])
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else
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AC_MSG_RESULT([no])
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PKG_CONFIG=""
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fi
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fi[]dnl
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])])
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